JPS61142412A - Mounting device for displacement measuring apparatus - Google Patents

Abstract

PURPOSE:To enable the mounting of two detectors without imparing the post- mounting accuracy, by providing a pair of screw members screwed with a second member and a retaining member which will be mounted in such a manner as to oscillate in a fixed range with the flattened tip thereof. CONSTITUTION:Screw members 28 and 29 which are formed in a bolt are aligned in the direction perpendicular to retaining plate 26 and screwed with a pair of erection parts 23A and 23B as opposed to each other on a shaft 27. The screw members 28 and 29 are arranged to free to advance and retract along the shaft 27 and the erection parts 23A and 23B have a freedom along the surface of the retaining plate 26. With such an arrangement, the plane 23A of a retaining member 32 mounted at the tips of the screw members 28 and 29 has a 3-D freedom with respect to the retaining plate 26. First and second detection bodies 22 and 24 can be mounted without imparing the accuracy after the mounting.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a mounting device for a displacement measuring device, and particularly to a mounting device for a displacement measuring device.
It has a first sensing body attached to a member, and a second sensing body attached to a second member and capable of reciprocating movement along the first sensing body together with the second member. From the relative movement between the first sensing body and the second sensing body, the first sensing body
The present invention also relates to an improvement in a mounting device for mounting the second sensing body to the second member of a displacement measuring device that measures relative displacement of the second member.

[Conventional technology]

One type of displacement measuring device for measuring or adjusting the relative position of two objects is one constructed as shown in FIG. 4, for example. In the figure, an elongated case 1 has a substantially rectangular hollow cross section, is elongated in a direction perpendicular to the paper plane of FIG. A detection mechanism 3 as a moving member is brought into contact with the end face of the elongated case 1 on the opening 2 side via a sliding member 4, and is movable along the longitudinal direction of the elongated case 1. An arm portion 5 extending from the opening 2 into the elongated case 1 is integrally formed on the lower surface of the detection mechanism 3 . Further, a pair of magnets 6 are provided along the longitudinal direction of the elongated case 1 on the outer surface of the elongated case 1 in the vicinity of the opening 2, and the magnets 6 are made of a thin iron plate so as to cover the opening 2. The closing member 7 is attracted and prevents dust and the like from entering into the elongated case 1 through the opening 2. At this time, the blocking member 7 in the portion of the detection mechanism 3 into which the arm portion 5 is inserted is inserted into a side chevron-shaped groove 8 provided in the detection mechanism 3 and having both ends opened on the lower surface of the detection mechanism 3. The arms 5 in the straddled state can be inserted into the elongated case 1. In the groove 9 provided in the longitudinal direction in the elongated case 1, there is a main scale 10 (first sensing body) made of glass or the like and having vertical striped scales formed on the - side (eye side) 10A.
The lower end side of is inserted and fixed with adhesive 11 or the like. The arm portion 5 of the detection mechanism 3 extends to the vicinity of the main scale 10, and a slider 13 is movably attached to the tip thereof via a connecting means 12 made of, for example, a linear cantilever spring. The connecting means 12 consisting of the cantilever spring is connected to the slider 13
is pressed against the scale surface 10A side of the main scale 10, which also serves as the first scanning J11 standard surface, and
The slider 13 is also pressed against the end surface 10B, which is a second scanning reference surface orthogonal to the graduation surface 10A of the main scale 10. The slider 13 is screwed to a contact mounting member 13A formed from a plate material in an abbreviated shape, and to a short side of the contact mounting member 13A bent at one end, and the scale of the main scale 10 is not formed. A thick light emitting element mounting member 13B facing the surface and the contactor mounting member 1
The light-receiving element mounting member 13G is screwed (not shown) to the long side of the other end of the main scale 10 and is opposed to the graduation surface 10B of the main scale 10. On the surface of the contact attachment member 13A of the slider 13 facing the graduation surface 10B of the main scale 10, an index scale 14 (second detection body) is fixed. The light emitting element 1 as a light source is placed between the index scale 14 and the main scale 10.
5 and a light receiving element 16 are arranged. In this case, the light emitting element 15 is fixed to the light emitting element mounting member 13B fixed to the short side of the letter 1 of the contact mounting member 13A, and the light receiving element 16 is fixed to the long side of the letter 1 of the contact mounting member 13A. Two of the light receiving element mounting members 13C are each fixed to the light receiving element mounting member 13C. The inner surface of the letter 1 of the contact mounting member 13A, that is, the scale surface 10 that is the first scanning reference surface of the main scale 10.
A and a surface facing the end surface 10B, which is a second scanning reference surface perpendicular to this scale surface, are each provided with a sliding piece 1 made of a resin with a low coefficient of friction such as polyacetal resin.
7.18 are fixed, and these mouth motion pieces 17.18
is the main scale 10 due to the urging force of the connecting means 12.
The scale surface 10A and the end surface 10B perpendicular to the scale surface 10A are brought into contact with each other. In such a configuration, one of the elongated case 1 and the detection mechanism 3 as a moving member is attached, for example, the detection mechanism 3 is attached to the object to be measured (second member), and the other elongated case 1 is attached to the bed of the machine. (fJ/41 member) 19 Installation 1i When the object to be measured is moved while fixed to 19A and 19B, a bright and dark striped pattern will occur between the scale of the main scale 10 and the scale of the index scale 14. The light receiving element 16 reads the amount of movement of the object to be measured and performs measurement. In such a displacement measuring device, the main scale 1
The gap, parallelism, etc. between 0 and the index scale 14 have a very serious effect on measurement accuracy. For this reason, conventional displacement measuring devices of this type require post-manufacturing adjustment,
After the inspection, the elongated case 1 and the detection mechanism 3 are fastened and fixed with a fixture before shipping, so that the relative positions of the main scale 10 and the index scale 14 do not shift during transportation. To attach such a displacement measuring device to a machine tool, etc., the elongated case 1 and the detection mechanism 3 are attached to a movable part and a fixed part of the machine tool, etc., respectively, with the elongated case 1 and the detection mechanism 3 fixedly tightened with a fixture. Here, in general, the relative position WrgA between the fixed part and the movable part of a machine tool etc. almost never matches the relative positional relationship between the elongated case 1 and the detection mechanism 3 in the fixed state (
Generally, the positional relationship between the two is shifted two-dimensionally or three-dimensionally. For this reason, conventionally, when attaching the fixed elongated case 1 and detection mechanism 3 to the movable parts and fixed parts of a machine tool, etc., it was necessary to adjust the level, twist, etc. in order to match the surface, which was very difficult. In addition to requiring labor, the installation required the relative positional relationship between the elongated case 1 and the detection mechanism 3 to be firmly maintained in the same state, and the installation was a major problem in terms of work and accuracy. . For example, as a means for attaching the elongated case and the detection mechanism while maintaining the relative positional relationship as described above, there is a method described in Japanese Utility Model Application Publication No. 104654/1983. In this case, the sensing body on the movable side and the movable part of the machine tool etc. are connected via three link plates, so the structure is complex, adjustment is difficult, and manufacturing costs are high. There is a problem that it becomes ^. Therefore, not only the initial setting of the displacement measuring device, but also the installation of machine tools, etc. requires a great deal of effort and adjustment each time a mating member is changed, and moreover, it is almost impossible to return to the original state. There is a problem in that it is not possible to go back and set the settings. On the other hand, it is possible to reduce the number of intermediate connecting members such as link plates, but in this case, the accuracy and assembly accuracy of each intermediate connecting member must be dramatically increased. This poses a problem in that manufacturing costs further increase.

[Problems to be Solved by the Invention] This invention has been made in view of the above-mentioned conventional problems, and has a simple structure that allows the two sensing bodies in the above-mentioned displacement measuring device to be used on machine tools, etc. An object of the present invention is to provide a mounting device for a displacement measuring device that can be easily and quickly mounted to a movable part and a fixed part without damaging the 11 degrees between the two. [Means for Solving the Problems] The present invention includes a first sensing body attached to a first member, a first sensing body attached to a second member, and reciprocating along the first sensing body together with the second member. A second detecting body that has been made possible,
The second sensing body of the displacement measuring device is configured to measure the relative displacement of the first and second members from the relative movement between the first sensing body and the second sensing body. Second
In a mounting device for a displacement measurement wit for mounting on a member, a locking plate is formed integrally with the second sensing body and protrudes from a holding member that holds the second sensing body, and the locking plate is used as a lever to hold the second sensing body. The second locking plate is disposed facing each other on an axis orthogonal to the locking plate, and the second
A pair of screw members are screwed and attached to the member, and the proximal end is attached to the tip of at least one of the pair of screw members via a ball bearing so as to be swingable within a certain range, and the tip is flat. The above object is achieved by providing a locking member having the following structure. Further, the present invention achieves the above object by attaching the locking member to each of the pair of screw members.

【Example】

Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, the same or equivalent parts as those of the conventional displacement measuring device shown in FIG. 4 will be designated by the same reference numerals as in FIG. 4, and the description thereof will be omitted. As shown in FIGS. 1 to 3, this embodiment includes a first detection gap 22 attached to a first member 21, a first detection gap 22 attached to a second member 23, and a first detection gap 22 attached to a second member 23. and a second sensing body 24 that is capable of reciprocating along the first detection gap 22, and from the relative movement between the first detection gap 22 and the second detection gap 24, the first and second detection bodies 24 can be detected. 2 members 2
1. In a mounting device for a displacement measuring device for mounting the second sensing body 24 of a displacement measuring device adapted to measure a relative displacement of 22 to the second member 22, the second sensing body 24 is integrated with the second sensing body 24. A locking plate 26 is formed to protrude from the holding member 25 and holds the locking plate 26, and the locking plate 26 is disposed opposite to the shaft 27 perpendicular to the locking plate 26, and the tip thereof is A pair of screw members 28.29 are screwed and attached to the second member 23 so as to be able to move forward and backward with respect to the locking plate 26, and a base end side of the pair of screw members 28.2 is attached to the second member 23.
A locking member 32 is provided at the tip of each member 9 so as to be swingable within a certain range via a pole bearing 30, and has a flat tip 32A. The locking plate 26 is connected to the first sensing body 22 and the second sensing body 2.
The two sensing bodies 22 .
It is located between a pair of rising portions 23A and 23B that are spaced apart and parallel to each other in the relative movement direction of 24. The screw members 28 and 29 are bolt-shaped and are screwed into the pair of upright portions 23A and 23B, respectively, aligned in a direction perpendicular to the locking plate 26 and facing each other on the shaft 27. That is, the shaft 27, which is the common central axis of these screw members 28 and 29, is arranged parallel to the direction of relative movement of the first sensing body 22 and the second sensing body 24. The pole bearing 30 includes a bolt-shaped threaded member 28.
A locking member 32 is formed at the tip of 29 and has a substantially hemispherical shape.
The 0 spherical side is held rotatably. Therefore, the flat surface 3 formed at the tip of these locking members 32
2A is relative to the common axis 27 of the threaded members 28,29;
The angle of inclination is freely adjustable with respect to a plane perpendicular to this. Further, the tilting members 28, 29' can move forward and backward along the axis 27, and the rising portions 23A, 23B have a degree of freedom along the surface of the locking plate 26, so as a result, The plane 32A of the locking member 32 attached to the tips of the screw members 28 and 29 has a degree of freedom in three-dimensional directions relative to the locking plate 26. Next, with reference to FIG. 3, a case in which the displacement measuring device is fixed to the first member 21 and the second member 23 using the mounting device for the displacement measuring device according to the above embodiment will be explained. First, the elongated case 35 that supports the first sensing body 22 is fastened to the first member 21 with bolts 36. Next, a second sensing body 24 whose relative positional relationship is fixed in advance with respect to the first sensing body 22 by a fixing fitting (not shown)
, the second member 23 is held against the holding member 25 and the locking plate 26 which are integral with the second member 23, so that the rising portions 23A, 23B are in a position where the locking plate 26 is sandwiched in the direction of the axis 27. move it. In this state, the screw members 28 and 29 are rotationally driven,
The locking member 32 at the tip is advanced against both sides of the locking plate 26, and the locking plate 26 is sandwiched between the flat surfaces 32A. At this time, the locking plate 26 for the second member 23, that is, the second
A relative error in the direction of movement of the sensing body 24 is absorbed by adjusting the amount of threading of the screw members 28 and 29. Furthermore, since the locking member 32 is supported by the screw members 28 and 29 via the pole bearing 30, even if both sides of the locking plate 26 are tilted, the locking member 32 will not support the pole bearing 30. The locking plate 26 rotates about the center and is connected to the shaft 27.
can absorb the slope of Further, the tip of the locking member 32 is a flat surface 32A, which is pressed against both surfaces of the locking plate 26, so that the second member 23 and the locking plate 26 are firmly connected. Note that the error in the relative position between the locking plate 26 and the second member 23 in the direction orthogonal to the axis 27 is due to
A, 23B is absorbed by being displaced before engaging the screw member 28, 29. The installation of the displacement measuring device is completed by removing the fixing metal fittings (not shown) with the locking plate 26 firmly clamped by the locking members 32 at the tips of the screw members 28 and 29. When readjusting the relationship between the first member 21 and the second member 23 on the first sensing body 22 and second sensing body 24 side in the displacement measuring device after installation, use the screw member 28 as in the case of the installation. After loosening .29 and adjusting the relationship between the first member 21 and the second member 23, the screw member 2nd
29, the locking plate 26 may be tightened and fixed without changing the relative position W. In this embodiment, even if the range of imbalance in the relative positional relationship between the first member 21 and the second member 23 is large, the range of position adjustment by the screw members 28, 29 and the locking member 32 is large, so Can accommodate adjustments within the range of. In addition, the screw member 2 can be simply adjusted without making detailed adjustments.
8. With 29 loosened, first member 21 and second member 2
After adjusting the relationship 3 or the relationship between the first detection gap 22 and the second detection gap 24, it is only necessary to tighten and fix the screw members 28 and 29, so the adjustment and installation work can be done easily and quickly. There is. Furthermore, this embodiment has the advantage that the first member and the second member can be easily adjusted even after the displacement measuring device is attached. Furthermore, even if the relative positional relationship between the first member 21 and the second member 23 varies, the first sensing body 22 and the second sensing member 24 can be firmly secured without causing any positional variation between them. Can be connected to In addition, in the above embodiment, the locking member 32 is attached to the tip of each of the pair of screw members 28 and 29, and the flat surface 32 of the tip
Although the locking plate 26 is tightened and fixed by A, the present invention is not limited to this. For example, a spring member such as a coil spring may be attached to the tip of one screw member. , the one screw member is brought into contact with one surface of the locking plate 26 via the spring member, and the other screw member is brought into contact with the other surface of the locking plate 26 via the locking member 32. They may be pressed together. In this case, there is an advantage that the tightening force of the screw members 28, 29 against the locking plate 26 can be made uniform. The locking member 32 in the above embodiment has a substantially hemispherical shape, and is attached to the tip of a screw member via a pole bearing, and the tip contacts the locking plate. As long as it is planar, it is not necessarily limited to a hemispherical shape. Further, in the above embodiment, the screw members 28 and 29 are bolts, which are screwed onto the second member 23 side and can move forward and backward with respect to the locking plate 26, and can be fixed by tightening. It is not limited to bolts as long as they are Moreover, this invention provides optical displacement measurement 1! ! It is also applicable to mounting devices for general displacement measuring devices including electrostatic capacitance type, magnetic type, etc.

【Effect of the invention】

Since the present invention is configured as described above, when the displacement measuring device is attached to the first member and the second member with a simple structure, the first sensing body and the second
It is possible to easily align the position of the sensing body, and therefore the mounting work is easy and quick, and it has the excellent effect of preventing errors after mounting.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view showing an embodiment of the mounting device for a displacement measuring device according to the present invention, Fig. 2 is an enlarged sectional view taken along the line ■-■ in Fig. 1, and Fig. 3 is a displacement diagram according to the embodiment. FIG. 4 is a cross-sectional view showing a conventional displacement measuring device installed. 21... First member, 22... First detection body, 23... Second member, 24... Second detection body, 25... Holding member, 26... Locking plate, 27 ...shaft, 28.29...screw member, 30...pole bearing, 32...locking member, 32A...plane.

Claims (2)

[Claims] (1) A first sensing body attached to the first member, and a second sensing body attached to the second member and capable of reciprocating along the first sensing body together with the second member. The second sensing body of the displacement measuring device is configured to measure the relative displacement of the first and second members from the relative movement between the first sensing body and the second sensing body. In a mounting device for a displacement measuring device for mounting on two members, a locking plate that is integral with the second sensing body and protrudes from a holding member that holds the second sensing body, and a locking plate interposed therebetween, a pair of screw members disposed facing each other on an axis orthogonal thereto, and screwed onto the second member such that the tip can move forward and backward with respect to the locking plate; A locking member that is attached to the tip of at least one of the pair of screw members on the side so as to be swingable within a certain range via a pole bearing, and has a flat tip. Mounting device for measuring devices. (2) The mounting device for a displacement measuring device according to claim 1, wherein the locking member is attached to each of the pair of screw members.